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Table 5 Number of teeth affected by severe EARR according to tooth group (grade-IV RR according to Malmgren) (tooth level)

From: Root resorption, treatment time and extraction rate during orthodontic treatment with self-ligating and conventional brackets

 

Teeth affected by sEARR (n = 6)

Teeth non-affected by sEARR (n = 1698)

Total (N = 1704)

Tooth group

n (%)

n (%)

n (%)

  12,22

1 (0.2)

425 (99.8)

426 (100.0)

  11,21

1 (0.2)

425 (99.8)

426 (100.0)

  32,42

0 (0.0)

426 (100.0)

426 (100.0)

  31,41

4 (0.9)

422 (99.1)

426 (100.0)

  1. EARR: external apical root resorption, sEARR: severe external apical root resorption.
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Head & Face Medicine

ISSN: 1746-160X

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